645700848 has 80 divisors (see below), whose sum is σ = 1806613536. Its totient is φ = 197544960.

The previous prime is 645700831. The next prime is 645700859. The reversal of 645700848 is 848007546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110086 + ... + 115802.

Almost surely, 2^645700848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645700848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903306768).

645700848 is an abundant number, since it is smaller than the sum of its proper divisors (1160912688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645700848 is a wasteful number, since it uses less digits than its factorization.

645700848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922 (or 5916 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 645700848 is about 25410.6443838011. The cubic root of 645700848 is about 864.3250877155.

The spelling of 645700848 in words is "six hundred forty-five million, seven hundred thousand, eight hundred forty-eight".